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All Journal Syntax Literate: Jurnal Ilmiah Indonesia JTTM: Jurnal Terapan Teknik Mesin
Sugeng , Margono
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Aerospace Engineering Humanities Control & Systems Engineering Education Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Mechanical Engineering Social Sciences Other

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Performance analysis of the cooling tower at PT PLN IP PLTP Ulumbu Karolus Risandi Jebarus; Sugeng , Margono
JTTM : Jurnal Terapan Teknik Mesin Vol 6 No 2 (2025): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v6i2.1848

Abstract

This research focuses on the analysis of one of the important components in the Ulumbu Geothermal Power Plant (PLTP), namely the cooling tower, which plays a vital role in reducing water temperature through evaporative heat transfer. The purpose of this study was to evaluate the performance of the cooling tower operated by PT PLN Indonesia Power Services. Data was collected for four consecutive weeks by recording key parameters such as inlet and outlet water temperatures, ambient air temperature, and wet and dry bulb temperatures. These parameters were used as the basis for calculating cooling efficiency and avaluating the overall system performance. The results showed that the cooling tower operated with relatively stable efficiency, with a temperature drop (ΔT) ranging from 7.1°C to 8.2°C and an efficiency level between 40.2% and 42.9%. Despite variations in ambient air temperature during the observation period, the system remained operating under acceptable conditions. Therefore, regular monitoring and maintenance are necessary to maintain the system's optimal function
Analisis Kegagalan Material Kabel Heating Rod Tamper pada Asphalt Finisher BOMAG BF800C Putra Hidayat, Andrean Mosa; Sugeng , Margono
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v11i3.64029

Abstract

Kabel heating rod pada Asphalt Finisher BOMAG BF800C menstabilkan suhu pemadat selama proses pemadatan aspal. Kabel ini dapat menahan suhu hingga ±200 °C dan guncangan mekanis. Kondisi ini berpotensi menyebabkan kerusakan material dan malfungsi kabel. Tujuan dari penelitian ini adalah untuk membandingkan karakteristik mekanik dan listrik dari kabel heating rod yang baru dan yang rusak guna menentukan proses terjadinya kerusakan. Beberapa metodologi penelitian yang digunakan termasuk pengujian tarik, pengujian kekerasan mikro Vickers, dan pengujian resistansi listrik. Hasil pengujian tarik menunjukkan penurunan kekuatan tarik dan elongation pada kabel yang rusak, sementara pengujian kekerasan mikro Vickers menunjukkan perubahan nilai kekerasan material. Pengujian tahanan listrik pada kabel yang rusak menunjukkan nilai tahanan tak terhingga (OL), yang mengindikasikan adanya konduktor yang putus. Temuan studi ini menunjukkan bahwa kerusakan kabel heating rod disebabkan oleh degradasi material akibat siklus termal dan stres mekanis yang sering terjadi selama operasi. Studi ini dirancang untuk memberikan dasar teknologi bagi upaya meningkatkan keandalan sistem pemanas Asphalt Finisher.
Co-Authors Karolus Risandi Jebarus Putra Hidayat, Andrean Mosa